Question 930580
 μ = 15.5 and σ = 3.6,  {{{z = blue(x - 15.5)/blue(3.6)}}} 
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P(x > 20) = P( z > 20) = P(z > 4.5/3.6) = normalcdf(1.25 , 100) = .1056  0r 10.56%